.

When we were young, we were brought up by our parents to _______ the table manners both at home and in public.

A．determine

B．observe

C．announce

D．control

不是电动塞拉门的开门方式的是（）。

A.通过激活开门列车线开门

B.通过维护按钮开门

C.通过操作紧急解锁装置开门

D.通过操作隔离锁装置开门